![]() ![]() ![]() Finally, we'll give the image a command to be executed when someone runs the image in a container. We'll then copy our code in the image, then run npm install to make sure the dependencies are up-to-date. We'll start with an OS+Framework combination to keep things simple. Yes, like any IT technology, you can make this as simple or as complicated as you like. You can also do just that - start with an OS and add a framework - and save that image and use it as your base for other images. You can - and there might be good reasons for this - start with the operating system and then install the framework all inside your image as you build it. So it's pretty common to start from that point. The build process is done in layers, with the starting point typically being an operating system or, more likely, an OS and framework combination. We'll create a file called "Dockerfile" that contains the steps and information needed to build an image. You need the code you're going to run, a file to configure/manage the build process, and the tool (i.e. So, if you are not using podman, simply use the command docker in place of every podman in the following. In fact, you could run alias docker=podman and you'd not know the difference. Because it is safer (it does not require root access), I'm going to use Podman to build and run my container, knowing that the commands used are 100 percent compatible with the docker command. Which method you use to build and run your container is based on your operating system and tool selection. ![]() After reading the previous blog post in this series, " Containers, Kubernetes, microservices: Start here", you're now ready to build your first "Hello World" application and run it in a container. ![]()
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